I love the epicness of Arthas walking up the frozen throne, killing his own father, ect. It was just so much more bad ass then a cartoonish dragon flying into the corrupted tears of elune. So much more dramatic.
Illidan summoning the naga was also an epic moment I will never forget. Archimond destroying dalaran in wc3, The human/orc army charging eachother in thralls vision.
I miss when Blizzard was about making Warcraft about war/blood and thunder. Not cartoonish cinema